Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
  • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
  • G03C7/3003—Materials characterised by the use of combinations of photographic compounds known as such, or by a particular location in the photographic element
  • G03C7/3005—Combinations of couplers and photographic additives
  • G03C7/3008—Combinations of couplers having the coupling site in rings of cyclic compounds and photographic additives
  • G03C7/301—Combinations of couplers having the coupling site in pyrazoloazole rings and photographic additives
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C7/00—Multicolour photographic processes or agents therefor; Regeneration of such processing agents; Photosensitive materials for multicolour processes
  • G03C7/30—Colour processes using colour-coupling substances; Materials therefor; Preparing or processing such materials
  • G03C7/392—Additives
  • G03C7/39208—Organic compounds
  • G03C7/3924—Heterocyclic

Definitions

• the present invention relates to a light-sensitive silver halide photographic material feasible for the rapid processing and improved in the color reproducibility and light-fastness of dye images.
• light-sensitive silver halide photgraphic materials (hereinafter referred to often as "light-­sensitive material(s)") having a high image quality and capable of being rapidly processed.
• An object of the present invention is to provide a color light-sensitive material improved in the color reproducibility, light-fastness of dye images and color-­forming performance, feasible for the rapid processing, and also suffering less yellowing of the white area.
• a light-sensitive material comprising a support and at least one silver halide emulsion layer provided thereon, wherein at least one layer of said silver halide emulsion layer contains silver halide grains containing 80 mol % or more of silver chloride, a magenta coupler represented by Formula (M-I) shown below, and a compound represented by Formula (A-0) shown below.
• M-I magenta coupler represented by Formula (M-I) shown below
• A-0 compound represented by Formula (A-0) shown below.
• Z represents a group of non-metallic atoms necessary for the formation of a nitrogen containing heterocyclic ring, which ring formed by Z may have a substituent
• X represents a hydrogen atom or a group capable of being split off through the reaction with an oxidized product of a color developing agent
• R represents a hydrogen atom or a substituent.
• A is a group of non-metal atoms necessary to complete a 5-member to 8-member nitrogen-containing ring, and R0 represents an aryl group or a heterocyclic group
• Z represents a group of non-metal atoms necessary for the formation of a nitrogen-containing heterocyclic ring, and the ring formed by Z may have a substituent.
• X represents a hydrogen atom or a group capable of being split off through the reaction with an oxidized product of a color developing agent.
• R represents a hydrogen atom or a substituent.
• R there is no particular limitation in the substituent represented by R, but it may typically include the groups such as alkyl, aryl, anilino, acylamino, sulfonamide, alkylthio, arylthio, alkenyl and cycloalkyl.
• halogen atom the groups such as cycloalkenyl, alkynyl, a heterocyclic ring, sulfonyl, sulfinyl, phosphonyl, acyl, carbamoyl, sulfamoyl, cyano, alkoxy, aryloxy, heterocyclic oxy, siloxy, acyloxy, carbamoyloxy, amino, alkylamino, imide, ureido, sulfamoylamino, alkoxycarbonylamino, aryloxycarbonylamino, alkoxycarbonyl, aryloxycarbonyl and heterocyclic thio, and a spiro compound residual group, a bridged hydrocarbon compound residual group, etc.
• a halogen atom the groups such as cycloalkenyl, alkynyl, a heterocyclic ring, sulfonyl, sulfinyl, phosphony
• the alkyl group represented by R may preferably be an alkyl group having 1 to 32 carbon atoms, which may be of stright-chain or branched-chain types.
• the aryl group represented by R may preferably be a phenyl group.
• the acylamino group represented by R may include an alkylcarbonylamino group, an arylcarbonylamino group, etc.
• the sulfonamide group represented by R may include an alkylsulonylamino group, an arylsulfonylamino group, etc.
• the alkyl component or aryl component in the alkylthio group or arylthio group represented by R may include the above alkyl group or aryl group represented by R, respectively.
• the alkenyl group represented by R may preferably be an alkenyl group having 2 to 32 carbon atoms; and the cycloalkyl group, a cycloalkyl group having 3 to 12, particularly 5 to 7, carbon atoms.
• the alkenyl group may be of straight-chain or branched-chain types.
• the cycloalkenyl group represented by R may preferably be a cycloalkenyl group having 2 to 12, particularly 5 to 7, carbon atoms.
• the sulfonyl group represented by R may include an alkylsulfonyl group, an arylsulfonyl group, etc.; the sulfinyl group, an alkylsulfinyl group, an arylsulfinyl group, etc.; the phosphonyl group, an alkylphosphonyl group, an alkoxyphosphonyl group, an aryloxyphosphonyl group, an arylphosphonyl group, etc.; the acyl group, an alkylcarbonyl group, an arylcarbonyl group, etc.; the carbamoyl group, an alkylcarbamoyl group, an arylcarbamoyl group, etc.; the sulfamoyl group, an alkylsulfamoyl group, an arylsulfamoyl group, etc.; the acyloxy group, an alkylcarbonyloxy group, an arylcarbon
• the group capable of being split off through the reaction with an oxidized product of a color developing agent may include, for example, a halogen atom (such as a chlorine atom, a bromine atom and a fluorine atom) and the groups such as alkoxy, aryloxy, heterocyclic oxy, acyloxy, sulfonyloxy, alkoxycarbonyloxyl, aryloxycarbonyl, alkyloxazyloxy, alkoxyoxazylozy, alkyl thio, arylthio, heterocyclic thio, alkyloxythiocarbonylthio, acylamino, sulfonamide, a nitrogen-containing heterocyclic ring linked with an N atom, alkyloxycarbonylamino, aryloxycarbonylamino, carboxyl and (R1 ⁇ has the same definition as in the above R; Z ⁇ has the same definition as the above Z; and R2 and R3 each represents a hydrogen atom,
• the nitrogen-containing heterocyclic ring formed by Z or Z ⁇ may include a pyrazole ring, an imidazole ring, a triazole ring or tetrazole ring, etc., and the substituent the above ring may have may include those described for the above R.
• magenta coupler represented by Formula (M-I) is more specifically represented by, for example, Formulas (M-­II) to (M-VII) shown below, respectively.
• R1 to R8 and X have the same definition as the above R and X, respectively.
• R1, X and Z1 have the same definition as R, X and Z in Formula (M-I), respectively.
• magenta couplers represented by Formulas (M-­II) to (M-VII) particularly preferred is the magenta coupler represented by Formula (M-II).
• R9, R10 and R11 each have the same definition as the above R.
• R9, R10 and R11 may be combined to form a saturated or unsaturated ring (for example cycloalkane, cycloalkene or a heterocyclic ring), or R11 may further be combined to said ring to constitute a bridged hydrocarbon compound residual group.
• a saturated or unsaturated ring for example cycloalkane, cycloalkene or a heterocyclic ring
• R11 may further be combined to said ring to constitute a bridged hydrocarbon compound residual group.
• Formula (M-IX) is (i) an instance in which at least two of R9 to R11 are each an alkyl group, and (ii) an instance in which any one of R9 to R11, for example, R11 is a hydrogen atom and the other two of R9 and R10 are combined to form a cycloalkyl together with a route carbon atom.
• the substituent the ring formed by Z in Formula (M-­1) or the ring formed by Z1 in Formula (M-VIII) may have and R2 to R8 in Formulas (M-II) to (M-VI) may preferably be a compound represented by Formula (X) shown below.
• R12 represents an alkylene group
• R13 represents a cycloalkyl group or an aryl group.
• the alkylene group represented by R12 may preferably have a carbon atom number of 2 or more, more preferably 3 to 6, at the part of the straight-chain, and may be of either straight-chain or branched-chain types.
• the cycloalkyl group represented by R13 may preferably be a cycloalkyl group of 5 or 6 members.
• examples of the compound according to the present invention may also include the compounds shown as Nos. 1 to 4, 6, 8 to 17, 19 to 24, 26 to 43, 45 to 59, 61 to 104, 106 to 121, 123 to 162 and 164 to 223 among the compounds described in Japanese Patent O.P.I. Publication No. 16339/1987.
• the above couplers can be also synthesized by making reference to Journal of the Chemical Society, Perkin I (1977), 2047-2052, U.S. Patent No. 3,725,067, Japanese Patent O.P.I. Publications No. 99437/1984, No. 42045/1983, No. 162548/1984, No. 171956/1984, No. 33552/1985, No. 43659/1985, No. 172982/1985, No. 190779/1985, etc.
• the couplers of the present invention can be used usually in the range of 1 x 10 ⁇ 3 mol to 1 mol, preferably 1 x 10 ⁇ 2 mol to 8 x 10 ⁇ 1 mol, per mol of silver halide.
• the couplers of the present invention can be used in combination with magenta couplers of different kinds.
• the anti-color-fading agent represented by the above Formula (A0) and is used in combination with the magenta coupler of the present invention will be described below.
• magenta dye image stabilizing agent of the present invention contained in the light-sensitive silver halide photographic material of the present invention is used in combination with the magenta coupler of the present invention, there can be obtained not only the effect of preventing the magenta dye image from being color-faded owing to light but also the effect of preventing the white area from being yellowed owing to light.
• the compound represented by Formula (A0) is more specifically represented by Formula (A) or Formula (B) shown below.
• R1 represents an aryl group or a heterocyclic group
• Z1 and Z2 each represent an alkylene group having 1 to 3 carbon atom, provided that the total sum of the carbon atom number of the alkylene group represented by Z1 and Z2 each is 3 to 6
• n represents 1 or 2.
• R1 represents an alkyl group, a cycloalkyl group, an alkenyl group, an aryl group, a heterocyclic group, an acyl group, a bridged hydrocarbon group, an alkyl sulfonyl group or an aryl sulfonyl group
• R2 represents a group capable of being substituted on the benzene ring
• m represents an integer of 0 to 4, provided that a plurality of R2 may be the same or different when m is 2 or more or may form a ring with each other, or R2 may form a ring together with -OR1 (wherein R1 is as defined above); and
• A represents a group of non-­metal atoms necessary for the formation of a 5- to 8- membered ring together with a nitrogen atom.
• the aryl group represented by R1 may include, for example, a phenyl group, a 1-­naphthyl group, etc., and these aryl groups may have a substituent.
• the substituent may include the substituents such as those set out as the substituents of R in Formula (M-I).
• the heterocyclic group represented by R1 may include, for example, a 2-furyl group, a 2-thienyl group, etc., and these heterocyclic groups include those having the substituents such as those set out for R in Formula (M-­I).
• Z1 and Z2 each represent an alkylene group having 1 to 3 carbon atoms, provided that the total sum of the carbon atom number of the alkylene group represented by Z1 and Z2 each is 3 to 6.
• These alkylene groups may have the substituent such as those set out for R in Formula (M-I).
• n 1 or 2.
• R1 is a phenyl group
• Z1 and Z2 each are an ethylene group
• n is 2.
• magenta dye image stabilizing agent of the present invention examples are shown below.
• magenta dye image stabilizing agent of the present invention Typical examples for the synthesis of the magenta dye image stabilizing agent of the present invention will be described below.
• the above magenta dye image stabilizing agent represented by Formula (A) of the present invention may be used preferably in an amount of 5 to 400 mol %, more preferably 10 to 300 mol %, based on the magenta coupler of the present invention.
• magenta dye image stabilizing agent represented by the above Formula (B) is used in another embodiment of the present invention in combination with the magenta coupler of the present invention will be described below.
• the alkyl group represented by R1 may include, for example, an straight-chain or branched-­chain alkyl group having 1 to 24 carbon atoms; the cycloalkyl group, for example, a cycloalkyl group having 5 to 24 carbon atoms; the alkenyl group, for example, an alkenyl group having 3 to 24 carbon atoms; the aryl group, for example, a phenyl group and a naphthyl group; the heterocyclic group, for example, a pyridyl group, an imidazolyl group and a thiazolyl group; the acyl group, for example, an acetyl group and a benzoyl group; the bridged hydrocarbon group, for example, a bicyclo[2.2.1]heptyl group, and so forth, respectively.
• the cycloalkyl group for example, a cycloalkyl group having 5 to 24 carbon atoms
• the alkenyl group for example, an
• R1 include those further having a substituent.
• R1 is an alkyl group.
• the group represented by R2 and capable of being substituted on the benzene ring may typically include a halogen atom and the groups such as alkyl, aryl, alkoxy, aryloxy, alkylthio, arylthio, acyl, alkoxycarbonyl, carbamoyl (for example, alkylcarbamoyl, arylcarbamoyl, etc.), ureido (for example, alkylureido, arylureido, etc.), sulfamoyl (for example, alkylsulfamoyl, arylsulfamoyl, etc.), amino (including substituted amino), alkylsulfonyl, arylsulfonyl, nitro, cyano and carboxy.
• R2 preferred as R2 are a halogen atom, an alkyl group and an alkylthio group.
• the groups represented by R2 may further have a substitu
• m represents an integer of 0 to 4, but may preferably represent 0 to 2.
• the 5- to 8-membered ring formed by A may include the rings such as pyrrolidine, piperidine, piperadine, morpholine and pyridine. These rings include those having a substituent.
• the group -OR1 can be located at any position with regard to but preferably at the p-position.
• magenta dye image stabilizing agent of the present invention represented by Formula (B) will be shown below, but by no means limited to these.
• the compound used in the present invention may also include the compounds described in Japanese Patent Application No. 241743/1986 (unpublished).
• magenta dye image stabilizing agent represented by Formula (B) of the present invention may be used preferably in an amount of 5 to 300 mol %, more preferably 10 to 200 mol %, based on the magenta coupler of the present invention.
• magenta coupler of the present invention and the magenta dye image stabilizing agent of the present invention may preferably be used in the same layer, but this stabilizing agent may also be used in a layer adjacent to the layer in which said coupler is present.
• a phenol type antioxidant represented by Formula (II) shown below may preferably be used in the silver halide emulsion layer containing the magenta coupler.
• R3 represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group or a heterocyclic group
• R4, R5, R7 and R8 each represent a hydrogen atom, a halogen atom, a hydroxyl group, an alkyl group, an alkenyl group, an aryl group, an alkoxy group or an acylamino group
• R6 represents an alkyl group, a hydroxy group, an aryl group or an alkoxy group.
• R3 and R4 may be ring-closed each other to form a 5- or 6-­membered ring, and R6 in such an instance represents a hydroxyl group or an alkoxy group.
• R3 and R4 may be ring-closed to form a methylenedioxy ring.
• R5 and R6 may be ring-closed to form a 5-membered hydrocarbon ring, and R3 in such an instance represents an alkyl group, an aryl group or a heterocyclic ring, except, however, the instance in which R3 is a hydrogen atom and R6 is a hydroxyl group.
• This phenol type compound or phenyl ethyer type compound represented by Formula (II) may be used preferably in the range of 1 x 10 ⁇ 2 mol to 5 mols, more preferably 1 x 10 ⁇ 1 mol to 2 mols, per mol of the magenta coupler of the present invention.
• a compound represented by Formula (S) shown below may preferably be used for the purpose of maintaining the effect of the present invention, i.e., the effect of improving the rapid processing feasibility, color reproducibility and light-­fastness and also for the purpose of suppressing the minimum density of a dye image to a lower level.
• Q represents a group of atoms necessary for the formation of a 5- or 6-membered heterocyclic ring that may be condensed with a benzene ring; and M represents a hydrogen atom, an alkali metal atom or an ammonium group.
• the heterocyclic ring formed by Q and that may be condensed with a benzene ring may include the rings such as imidazole, tetrazole, thiazole, oxazole, selenazole, benzimidazole, naphthimidazole, benzothiazole, naphtothiazole, benzoselenazole, naphthoselenazole, benzoxazole, pyridine, pyrimidine and quinoline, and these heterocyclic rings include those having a substituent.
• the compound may preferably be added in the course of the chemical ripening, at the time of the completion of the chemical ripening, or in the time of after the completion of the chemical ripening and before the coating.
• the compound may be added in one time in its whole amount, or may be added in plural portions.
• the compound (S) may be used usually in the range of 1 x 10 ⁇ 6 to 1 x 10 ⁇ 1 mol, preferably 1 x 10 ⁇ 5 to 1 x 10 ⁇ 2 mol, per mol of silver halide.
• a fast-reactive yellow coupler preferably used in the present invention is a yellow coupler having a relative coupling reaction rate of 0.5 or more.
• the coupling reaction rate of a coupler can be determined as a relative value by measuring the amount of respective dyes in a color image which is obtained by mixing two types of couplers M and N capable of giving mutually distinctively separable different dyes, adding them in a silver halide emulsion, and then carrying out color development.
• This method is described in Japanese Patent O.P.I. Publications No. 178954/1987 and No. 178252/1987, Japanese Patent Applications No. 97513/1986, No. 97154/1986 and No. 135150/1986 (unpublished), etc.
• RM/RN coupling activity ratio
• the yellow coupler may preferably be added in an amount of from 2 x 10 ⁇ 3 to 5 x 10 ⁇ 1 mole, more preferably from 1 x 10 ⁇ 2 to 5 x 10 ⁇ 1 mol, per mol of silver.
• magenta coupler of the present invention may be added in an intended hydrophilic colloid layer after it is dissolved in a high-boiling organic solvent boiling at about 150°C or more, optionally with use of a low-boiling and/or water-soluble organic solvent in combination, and dispersed by emulsification in a hydrophilic binder such as an aqueous gelatin solution with use of a surface active agent.
• a hydrophilic binder such as an aqueous gelatin solution with use of a surface active agent.
• a compound having a dielectric constant of 7.0 or less preferably 2.0 or more at the minimum, at 30°C.
• the compound having a dielectric constant of 7.0 or less may include esters such as phthalate and phosphate, organic amides, ketones, hydrocarbon compounds, etc.
• the high-boiling solvent preferably used may include dibutyl phthalate, dihexyl phthalate, di-2-ethyl-hexyl phthalate, dioctyl phthalate, dinonyl phthalate, didodecyl phthalate, di-i-octadecyl phthalate, tricrezyl phthalate, trioctyl phthalate, tri-i-nonyl phthalate, tri-i-dodecyl phthalate, etc.
• a cyan coupler to be used together with the magenta coupler of the present invention and the fast-reactive yellow coupler, but there can be preferably used the 2,5-diacylaminophenol type cyan couplers described in Japanese Patent O.P.I. Publications No. 112038/1975, No. 109636/1978, No. 163537/1980, No. 31935/1980, No. 100440/1984, No. 121332/1984, No. 124341/1984, No. 139352/1984, No. 146050/1984 and No. 166956/1984, U.S. Patent No. 2,895,826, etc., and 2-acylaminophenol type cyan couplers described in Japanese patent O.P.I.
• cyan couplers may be used either alone or in combination, and can be used usually in the range of 1 x 10 ⁇ 3 to 1 mole, preferably 1 x 10 ⁇ 2 to 8 x 10 ⁇ 1 mole, per mol of silver.
• the silver halide emulsion layer containing the magenta coupler of the present invention contains silver halide grains containing 80 mol % or more of silver chloride.
• the silver halide grains of the present invention contain 80 mol % or more of silver chloride, and may preferably have a silver chloride content of 90 mol % or more.
• the content of silver bromide may preferably to 10 mol % or less; and the content of silver iodide, 0.5 mol % or less. More preferably, the content of silver chloride may be 95 mol % or more.
• the silver halide grains of the present invention may be used alone or may be used by mixing them with other silver halide grains of different compositions. The may be also used by mixing them with silver halide grains having a silver chloride content of 10 mol % or less.
• the proportion of the silver halide grains having a silver halide content of 80 mol % or more may account for 60 % by weight or more, preferably 80 % by weight or more, of the total silver halide grains contained in said emulsion layer.
• the silver halide grains of the present invention may have the composition that is uniform from the inside to outside of a grain, or that is different between the inside and outside of a grain. In the instance in which the composition is different between the inside and outside of a grain, the composition may vary either continuously or discontinuously.
• the grain size of the silver halide grains of the present invention may preferably be in the range of 0.2 to 1.6 ⁇ , more preferably 0.25 to 1.2 ⁇ m, taking account of other photographic performances such as rapid processability and sensitivity.
• the silver halide grains used in the emulsion of the present invention may preferably be the grains such that a latent image is formed chiefly on the surface.
• the emulsion of the present invention is chemically sensitized according to a conventional method.
• the emulsion of the present invention can be spectrally sensitized to a desired wavelength with use of a sensitizing dye.
• silver halide grains to be used in the emulsion layer(s) other than the above silver halide emulsion layer according to the present invention, but such silver halide grains may preferably have a silver chloride content of 80 mol % or more in the same manner as used in the silver halide emulsion layer according to the present invention.
• the light-sensitive silver halide photographic material constituted as above can be, for example, a color negative film or positive film and a color photographic paper, but the effect of the present invention can be effectively exhibited when it is used as a color photographic paper used for direct view.
• additives such as hardening agents, plasticizers, latex, surface active agents, matting agents, lubricants and antistatic agents.
• the light-sensitive silver halide photographic material of the present invention can form an image by carrying out the color development processing known in the present industrial field.
• a color developing solution may have a pH value of usually 7 or more, most generally about 10 to 13.
• the color development may be carried out at a temperature of usually 15°C or more, and generally in the range of 20°C to 50°C.
• the rapid development it may preferably be carried out at 30°C or more.
• the development has been carried out conventionally in 3 minutes to 4 minutes, but, in the present invention aiming at the use in the rapid processing, may preferably be carried out in the range of 20 seconds to 60 seconds, more preferably in the range of 30 seconds to 50 seconds.
• the light-sensitive silver halide photographic material of the present invention is subjected to bleaching and fixing after the color development.
• the bleaching may be carried out simultaneously with the fixing.
• washing is carried out usually.
• stabilizing may be carried out, or both of them may be combined.
• the light-sensitive silver halide photographic material of the present invention was found to have a superior color reproducibility, have been improved simultaneously in both the color-forming performance and light-fastness of the magenta dye image to be formed, have a superior rapid processing feasibility, and also suffer less yellowing at the white area.
• Coupler dispersions was prepared according to the process shown below and with the composition as shown in Table 1.
• the resulting dispersions each were mixed in 500 g of a green-sensitive silver halide emulsion prepared according to the process shown below, and 10 ml of an aqueous 10 % solution of sodium 2,4-dihydroxy-6-chloro-s-triazine was added therein as a hardening agent.
• the resulting solutions each were coated on a polyethylene-coated paper support, followed by drying to obtain Samples 1 to 13.
• aqueous solution of silver nitrade and an aqueous solution of sodium chloride were added and mixed with stirring in an aqueous inert gelatin solution according to a double jet method.
• Further added in the same manner were an aqueous solution of silver nitrate and an aqueous solution of potassium bromide.
• the desalting was carried out according to a conventional method to obtain EM-1.
• EM-1 was found to be a cubic monodispersed silver chloride emulsion (silver chloride: 99.8 %; silver bromide: 0.2 %) having an average grain size of 0.5 ⁇ m.
• aqueous solution of silver nitrate and an aqueous halide solution (an aqueous solution comprising a mixture of potassium bromide with sodium chloride) were added and mixed in an aqueous inert gelatin solution according to a double jet method.
• the desalting was carried out according to a conventional method to obtain EM-2.
• EM-2 was found to be a tetradecahedral silver chloride emulsion containing 90 mol % of silver bromide, having an average grain size of 0.5 ⁇ m.
• Spectra of spectral reflection of the respective color-formed samples were measured by use of a color analyzer Type-607 (available from Hitachi, Ltd.). Here, the maximum density of the absorption spectra at visible areas of the respective samples were measured by standardizing them to 1.0. The reflection density of the respective samples at 430 nm was regarded as the secondary absorption density, and used as an indication for the color purity.
• Samples 1 and 2 in which the comparative couplers are used show a high secondary density and a cloudy colour in magenta images, giving unsharp images. Also, as is seen in Sample 2, the color-forming performance is improved by using silver halide grains having a high silver chloride content even if the comparative coupler is used, but is only improved with insufficiency.
• Samples 7 to 12 in which the compound S-14 is used show better light-fastness than Sample 13 in which the compound SC-1 is used, and smaller values also as to the stain, thus being desirable for the color reproduction.
• the color-forming performance also is improved with more preferable results when the silver chloride content in the silver halide grains is not less than 90 mol % and not more than 99.9 mol %.
• Respective layers of the composition shown below were provided by coating in sequence from the support side, on supports comprising polyethylene-coated paper to prepare color light-sensitive materials for multicolor photography.
• the amount of compounds is indicated by the amount per 100 cm2.
• UV-1 Ultraviolet absorbent
• UV-2 Ultraviolet absorbent
• DNP 4 mg
• HQ-1 0.45 g
• gelatin 14 mg.
• UV-1 2 mg
• UV-2 2 mg
• DNP 2 mg
• gelatin 6 mg
• D-1 (same as in Example 1) was used as the sensitizing dye for Em-B, Em-C and Em-D; D-2, for Em-A; and D-3, for Em-E.
• the samples of the present invention show good results for all the light-­fastness, color-forming performance, color reproducibility and resistance to yellowing by light, of magenta dye images. There is also attained a good color-fading balance or color-forming balance between the yellow, magenta and cyan images, thus obtaining sharp images.
• the phenol type antioxidants or the metal complexes are used as the anti-color-fading agent in combination with the compound of the present invention, the light-fastness of the magenta image is improved and the color-fading by light is well-balanced, thus obtaining favorable results.
• Coupler dispersions was prepared according to the process shown below and with the composition as shown in Table 4.
• the resulting dispersions each were mixed in 500 g of a green-sensitive silver halide emulsion prepared according to the process shown below, and 10 ml of an aqueous 10 % solution of sodium 2,4-dihydroxy-6-chloro-s-triazine was added therein as a hardening agent.
• the resulting solutions each were coated on a polyethylene-coated paper support, followed by drying to obtain Samples 1 to 13.
• aqueous solution of silver nitrate and an aqueous solution of sodium chloride were added and mixed with stirring in an aqueous inert gelatin solution according to a double jet method.
• Further added in the same manner were an aqueous solution of silver nitrate and an aqueous solution of potassium bromide.
• the desalting was carried out according to a conventional method to obtain EM-1.
• EM-1 was found to be a cubic monodispersed silver chloride emulsion (silver chloride: 99.8 %; silver bromide: 0.2 %) having an average grain size of 0.5 ⁇ m.
• aqueous solution of silver nitrate and an aqueous of halides (an aqueous solution comprising a mixture of potassium bromide with sodium chloride) were added and mixed in an aqueous inert gelatin solution according to a double jet method.
• the desalting was carried out according to a conventional method to obtain EM-2.
• EM-2 was found to be tetradecahedral silver chloride emulsion containing 90 mol % of silver bromide, having an average grain size of 0.5 ⁇ m.
• Spectra of spectral reflection of the respective color-formed samples were measured by use of a color analyzer Type-607 (available from Hitachi, Ltd.). Here, the maximum density of the absorption spectra at visible areas of the respective samples were measured by standardizing them to 1.0. The reflection density of the respective samples at 430 nm was regarded as the secondary absorption density, and used as an indication for the color purity.
• Samples 1 and 2 in which the comparative couplers are used show a high secondary density and a cloudy color in magenta images, giving unsharp images. Also, in Sample 2 in which the silver halide grains having a high silver chloride content, the color-forming performance is improved, but only with insufficiency.
• Sample 4 in which the magenta coupler of the present invention and the silver halide grains having a silver chloride content of 99.8 mol % are used shows good results for both color-forming performance and color reproducibility, but a poor result for light-fastness.
• Sample 5 in which the comparative anti-color-fading agent is used shows a small effect of improving the light-fastness
• Sample 6 involves the problem that the color-forming performance is deteriorated. Thus, these can not satisfy all of the performances.
• Samples 7 to 12 in which the compound S-14 is used show better light-fastness than Sample 13 in which the compound SC-1 is used, and smaller values also as to the stain, thus being desirable for the color reproduction.
• the color-forming performance also is improved with more preferable results when the silver chloride content in the silver halide grains is not less than 90 mol % and not more than 99.9 mol %.
• Respective layers of the composition shown below were provided by coating in sequence from the support side, on supports comprising polyethylene-coated paper to prepare color light-sensitive materials for multicolor photography.
• the amount of compounds is indicated by the amount per 100 cm2.
• Magenta coupler 4 mg; green-sensitive silver chloride emulsion (Em-B, -C or -D) shown below, 2 mg (B, D) or 4 mg (C) in terms of silver; high-boiling organic solvent (DOP), 4 mg; anti-color-fading agent (*), in an amount equimolar to magenta coupler; and gelatin, 16 mg.
• UV-1 Ultraviolet absorbent
• UV-2 Ultraviolet absorbent
• DNP 4 mg
• HQ-1 0.45 g
• gelatin 14 mg.
• UV-1 2 mg
• UV-2 2 mg
• DNP 2 mg
• gelatin 6 mg
• D-1 (same as in Example 1) was used as the sensitizing dye for Em-B, Em-C and Em-D; D-2, for Em-A; and D-3, for Em-E.
• the samples of the present invention show good results for all the light-­fastness, color-forming performance and color reproducibility, of magenta dye images. There is also attained a good color-fading balance or color-forming balance between the yellow, magenta and cyan images, thus obtaining sharp images.
• the phenol type antioxidants or the metal complexes are used as anti-color-fading agent in combination with the compound of the present invention, the light-fastness of the magenta image is improved and the color-fading by light is well-balanced, thus obtaining favorable results.

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• Spectroscopy & Molecular Physics (AREA)
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• 1987
  • 1987-12-23 EP EP87311382A patent/EP0273712B1/de not_active Expired
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